1 Department of Surgery and Medical-Surgical Specialties, General and Oncologic Surgery Unit, Vittorio-Emanuele University Hospital of Catania, Italy; Semmelweiss University of Budapest, Asklepios Campus Hamburg, Germany. Electronic address: mar_donati@libero.it.
2 Department of General and Abdominal Surgery, Asklepios Barmbek Hospital, Germany. Electronic address: gregor@stavrou.de.
3 Department of Oncology, Asklepios Barmbek Hospital, Hamburg, Germany. Electronic address: a.stang@asklepios.com.
4 Department of Surgery and Medical-Surgical Specialties, General and Oncologic Surgery Unit, Vittorio-Emanuele University Hospital of Catania, Italy. Electronic address: fbasile@unict.it.
5 Department of General and Abdominal Surgery, Asklepios Barmbek Hospital, Germany; Semmelweiss University of Budapest, Asklepios Campus Hamburg, Germany. Electronic address: k.oldhafer@asklepios.com.